Motor driven razor



Patented June 20, 1939 MOTOR DRIVEN RAZOR Barney R. Nyhagen, New York, N. Y.

Original application July 14, 1936, Serial No. 90,555. Divided and this application June 23,-

1938, Serial No. 215,362

4 Claims. (01. 30-4 3) This invention relates to motor driven razors or hair cutting implements knownas. dry shavers, and the same is a division of my Patent No. 2,124,985 granted July 26, 1938. I

The present invention is directed to an improved cutter head for an electric razor or dry shaver in which the movable cutter element is provided with a toothed fin disposed between pairs of toothed flanges on the fixed cutter element and adapted for reciprocation with reference thereto to sever the hair when the toothed flanges are moved over the skin.

As a further feature the invention resides in a cutter head of the indicated character in which portions of the fixed cutter head are resilient so as to inherently impinge the confronting faces of the toothed flanges thereof against the opposite side faces of the toothed fin. of the movable cutter element to insure a shearing action as the teeth of the fin reciprocate with reference to the teeth of the flanges.

With the above enumerated and other objects in view, reference is now made to the following specification and the accompanying drawing in which there is illustrated an embodiment of the invention.

In the drawing:

Fig. 1 is a side view of a motor driven razor with parts broken away to show the underlying structure.

Fig. 2 is a fragmentary enlarged transverse sectional view taken approximately on the line indicated at 2-2 in Fig. 1.

Fig. 3 is an enlarged side view of the cutter head removed from the holder and with parts broken away.

Fig. 4 is a plan view thereof with parts broken away and shown in section.

Referring to the drawing by characters of reference, A designates generally the cutter unit and B the holder member therefor which member consists of a hollow handle constituting a housing for a motor ll diagrammatically illustrated in the presentinstance as an electrical motor and having a shaft l2, one terminal of which extends into the groove l3 formed at one end of the handle and is provided with an eccentric or crank pin ll.

The cutter unit A consists of a fixed cutter element l5 and a movable cutter element iii. The fixed cutter element I5 is of generally rectangular shape and is adapted to snugly fit within the groove l3 of the holder member B illustrated in Fig. 1 of the drawing. The fixed cutter element in this instance tapers upwardly and terminates in a pair of spaced parallel upwardly projecting flanges I1 and is provided with transversely exending notches defining aligned series of teeth Ill. The fixed cutter element [5 is provided with a longitudinally extending circular bore l9 and. has a longitudinal slot 20 communicating with the bore, with the walls of the slot fiush with the inner surfaces of the flanges l1. The movable cutter element I6 is of cylindrical formation and is mounted for reciprocation 10 within the bore 19 of the fixed cutter element l5 and said cutter element I6 is formed with a pref-- erably integral upstanding fin 2| snugly fitting within the slot 20 and between the flanges H, the

said fin being transversely slotted to provide a 15 longitudinally extending series of cooperating teeth 22 located between the teeth l8 of the fixed cutter element and adapted to cooperate therewith in severing the hair.

The lower side of themain body of the mov- 20 able cutter element 16 is provided with a transverse groove 23 with which theeccentric pin ll of the motor shaft I2 is adapted to cooperate to effect reciprocations'of the movable cutter element, the lower portion of the fixed cutter element being provided with an opening 24 to receive the terminal of the motor shaft.

The upper, opposite side portions of the fixed cutter element l5 are resilient and are so arranged as to inherently impinge the confronting faces of the flangese l'l against the opposite side faces of the fin 2| so as to insurea shearing action as the teeth 22 of the fin reciprocate with reference to the teeth Not the flanges ll.

What is claimed is:

1. In a power driven hair cutting implement,

' a combined holder and actuating member and a cutter unit carried thereby including cooperative cutter elements relatively fixed and movable with reference to said holder and actuating member, the fixed cutter element having a longitudinally extending bore and a longitudinally extending slot communicating with the bore and opening through the upper end of said cutter element with upwardly extending spaced parallel flanges having longitudinally spaced aligned transverse grooves, the movable cutter element having a body slidably fitted within the bore and formed with a radial fin extending through the slot and between's'aid flanges and provided with longitudinally spaced transverse grooves.

2. In a power driven hair cutting implement, a combined holder and actuating member and a cutter unit carried thereby including cooperative cutter elements relatively fixed and movlel flanges having longitudinally spaced aligned transverse grooves, the movable cutter element having a body slidably fitted within the bore and formed with a radial fin extending through the slot-and between said flanges and provided with longitudinally spaced transverse grooves,

said fixed cutter element being of resilient material adapted to inherently urge the opposite side faces of the slotted portion and the inner surfaces of the flanges into contact with the opposite side faces of the fin.

3. In a power driven hair cutting implement, a combined holder and actuating member and a cutter unit carried thereby including cooperative cutter elements relatively fixed and movable with reference to said holder and actuating member, the fixed cutter element having a longitudinally extending bore and a longitudinally extending slot communicating with the bore and opening through the upper end of said cutter element with upwardly extending spaced parallel flanges having longitudinally spaced transverse grooves, the movable cutter element having 'a body slidably fitted within the bore and formed with a. radial fin extending through the slot and be- .tween said flanges and provided with longitudinally spaced transverse grooves, and said movable cutter element engaging said actuating member for longitudinal reciprocatory movement of the fin between the said flanges.

4. In a power driven hair cutting implement, a combined holder and actuating member and a cutter unit carried thereby including cooperative cutter elements relatively fixed and movable with reference to said holder and actuating member, the fixed cutter element having a longitudinally extending bore and a longitudinally extending slot communicating with the bore and opening through the upper end of said cutter element with upwardly extending spaced parallel flanges having longitudinally spaced transverse grooves, the movable cutter element having a body slidably fitted within the bore and formed with a radial fin extending through the slot and between said flanges and provided with longitudinally spaced transverse grooves, said fixed cutter element being of resilient material adapted to inherently urge the opposite side faces of the slotted portion and the inner surfaces of the flanges into contact with the opposite side faces of the fin, and said movable cutter element engaging said actuating member for longitudinal reciprocatory movement of the fin between the said flanges.

BARNEY R. NYHAGEN. 

